Experimental study of high-k turbulence during an energy confinement degradation phase in EAST ohmic plasmas
文献类型：期刊论文
| 作者 | Sun, P. J.2; Li, Y. D.2; Ren, Y.1 ; Zhang, X. D.2; Wu, G. J.2; Wang, Y. M.2; Liu, Y.2; Zhou, T. F.2; Gu, X.2; Yuan, X. Q.3
|
| 刊名 | NUCLEAR FUSION
 |
| 出版日期 | 2020-04-01 |
| 卷号 | 60 |
| ISSN号 | 0029-5515 |
| 关键词 | turbulence high-k transport EAST tokamak energy confinement |
| DOI | 10.1088/1741-4326/ab742e |
| 通讯作者 | Sun, P. J.(sunpj@ipp.cas.cn) |
| 英文摘要 | In this paper, we present experimental studies of both high-k(r) ( cm(-1), and , respectively; ) and high- ( cm(-1), and , respectively; ) turbulence behavior during an ohmic energy confinement degradation phase in experimental advanced superconducting tokamak (EAST). High-k(r) turbulence from density fluctuation at and high- turbulence from density fluctuation at -0.97 were measured by tangential and poloidal CO2 laser collective scattering diagnostics, respectively. Note that k(r), , and are radial wavenumber, poloidal wavenumber, perpendicular wavenumber and ion gyroradius at electron temperature, respectively. Both high-k(r)/ turbulence power and energy confinement time are found to be temporally correlated to line-averaged electron density n(e) in the plasma current flat-top phase (I-p = 0.4 MA): when the n(e) shows continuous increase/decrease, the high-k(r)/ turbulence power increases/decreases correspondingly and the shows corresponding decrease/increase; the stable n(e) is related to stable both and high-k(r)/ turbulence power. Statistical results of high-k(r)/ turbulence power versus further imply that high-k(r)/ turbulence shows a strong correlation with plasma energy confinement degradation in high line-averaged n(e) condition, but high-k(r) and high- turbulence have relatively weak and no dependence on the transition between linear range in low-n(e) condition and energy confinement degradation in the high-n(e) condition, respectively. Moreover, profiles of electron temperature T-e and n(e) as well as their normalized gradients in a part of high- density fluctuation measurement region also have been given to qualitatively explain the enhancement of turbulence power with the increase of line-averaged n(e). |
| WOS关键词 | DENSITY-FLUCTUATIONS ; PROFILE ; BACKSCATTERING ; SCATTERING ; ETG |
| 资助项目 | Collaborative Innovation Program of Hefei Science Center, CAS[2019HSC-CIP014] ; National Natural Science Foundation of China[11875286] ; National Natural Science Foundation of China[11475222] ; National Natural Science Foundation of China[11505228] ; National Natural Science Foundation of China[11735016] ; National Natural Science Foundation of China[11575238] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH001] ; K.C. Wong Education Foundation ; CASHIPS Directors Fund[BJPY2019A01] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000519028700001 |
| 资助机构 | Collaborative Innovation Program of Hefei Science Center, CAS ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS ; K.C. Wong Education Foundation ; CASHIPS Directors Fund |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/103947]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Sun, P. J. |
| 作者单位 | 1.Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Argonne Natl Lab, Lemont, IL 60439 USA 4.East China Univ Technol, Nanchang 330013, Jiangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, P. J.,Li, Y. D.,Ren, Y.,et al. Experimental study of high-k turbulence during an energy confinement degradation phase in EAST ohmic plasmas[J]. NUCLEAR FUSION,2020,60. |
| APA | Sun, P. J..,Li, Y. D..,Ren, Y..,Zhang, X. D..,Wu, G. J..,...&Li, J. G..(2020).Experimental study of high-k turbulence during an energy confinement degradation phase in EAST ohmic plasmas.NUCLEAR FUSION,60. |
| MLA | Sun, P. J.,et al."Experimental study of high-k turbulence during an energy confinement degradation phase in EAST ohmic plasmas".NUCLEAR FUSION 60(2020). |
入库方式： OAI收割
来源：合肥物质科学研究院
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。